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Canon EOS Crop Sensor for HD
APS-C sensor cameras including the 80D, 70D, 7D Mk. II, 7D, EOS M and Rebel models for HD video recording.


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Old October 1st, 2009, 01:17 PM   #31
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Am I understanding correctly that the 5D can work a regular full day schedule like a video camera? I have followed the evolution of vdslr cams but have not heard much about 5Ds overheating.

This issue with the 7D is a bit of a surprise and changing my perspective on it's ability to work for me as an alternative to my EX1 at times. 90 percent of what I do is outdoor shooting and generally in the sun. No where in any pre production reviews did I see any warnings about overheating. So is this a defect or a shortcoming?

I am trying to think about work a rounds but it does not seem that one will be able to use this camera like a normal video camera. Will Zacuto build the 7D zfreezer?

Trying to keep it positive but it feels like my new bike I got for Christmas has tires with permanent slow leaks.
Shot my 5D in near 100 degree whether on the pavement on a drag strip a couple of weeks ago, and never had a warning. It wasn't continuous shooting but I have never experience and issue with overheating on mine.
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Old October 1st, 2009, 01:25 PM   #32
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Shot my 5D in near 100 degree whether on the pavement on a drag strip a couple of weeks ago, and never had a warning. It wasn't continuous shooting but I have never experience and issue with overheating on mine.

So possibly this indicates an increased problem with the 7D compared to the 5D
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Old October 1st, 2009, 02:16 PM   #33
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Well I've said it twice before, but I suspect the dual processors in the 7D as opposed to just one in the 5D Mk. II might possibly be the cause of the difference between the two. Just shot two clips indoors at 1280p60; room temperature about 74 deg. F.

The first clip recorded fine; the second showed the temp. warning indicator at less than five minutes in (see attached pic).
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Overheating Warning Icon in mild temperatures-7dtemp1.jpg  
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Old October 1st, 2009, 02:22 PM   #34
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Here was my test this morning. Time lapse of the 7D in 78 degree air conditioning at 720 60p.

7D overheat time lapse on Vimeo

As you can see at about 30 minutes the high temp icon kicks in.
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Old October 1st, 2009, 02:51 PM   #35
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I just tried 480p60 indoors, 74 deg. F, got to 25:30 before the temp. warning.

So far I've been unable to record a full 30 minutes at 480p60 without getting the temp. warning.
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Old October 1st, 2009, 03:03 PM   #36
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What about normal 24fps 1080p shooting? This could be a serious problem.
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Old October 1st, 2009, 03:16 PM   #37
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Since when is 24fps "normal," Bill? Heh. Well if you want a test with an oddball frame rate, I just set it up. We'll see what happens.
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Old October 1st, 2009, 03:35 PM   #38
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Chris I meant 1280 x 720 60p

Is this not similar to EX1 720/60p?

Thanks
how did you record so long at that frame rate?
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Old October 1st, 2009, 03:36 PM   #39
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Well I've said it twice before, but I suspect the dual processors in the 7D as opposed to just one in the 5D Mk. II might possibly be the cause of the difference between the two.
That is a definite possibility. I wonder, however, if the DIGIC is the source of the heat or if the sensor itself is the problem. I have noticed that the 5D stays cooler with an external display since the LCD and backlight can be turned off. The strings in the firmware for the 5D refer to EFIC(?) sensor temp, not DIGIC temp.

Another thought that occurs to me is that Canon has lowered the temperature at which the warning comes on. A beta tester of the 1.1.0 firmware on a movie set reported (on another forum) that they were using two 5D bodies to be able to swap them out when they got hot. Both bodies eventually developed stuck/hot pixels as a result of continuous multi-hour shooting days. Perhaps Canon wants to be more careful that the 7D bodies don't develop this problem?
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Old October 1st, 2009, 03:44 PM   #40
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That is a definite possibility. I wonder, however, if the DIGIC is the source of the heat or if the sensor itself is the problem. I have noticed that the 5D stays cooler with an external display since the LCD and backlight can be turned off. The strings in the firmware for the 5D refer to EFIC(?) sensor temp, not DIGIC temp.

Another thought that occurs to me is that Canon has lowered the temperature at which the warning comes on. A beta tester of the 1.1.0 firmware on a movie set reported (on another forum) that they were using two 5D bodies to be able to swap them out when they got hot. Both bodies eventually developed stuck/hot pixels as a result of continuous multi-hour shooting days. Perhaps Canon wants to be more careful that the 7D bodies don't develop this problem?
yep I know someone who used 3 5dmkII on a film set and all of them are now dead due to overheating. A worry. Hence the cautious warning on the 7d. You should all move to England. It's cold here.
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Old October 1st, 2009, 03:58 PM   #41
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Maybe somebody requested that the 7D behave more like a RED ONE, so the Canon engineers added an overheating feature. ;) ;) ;)
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Old October 1st, 2009, 04:04 PM   #42
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Okay, so I shot several back-to-back clips at 1080p30 (this morning) and 1080p24 (just now), indoors in an air-conditioned room at around 74 deg. F. *without* getting the temp. warning indicator.

However, as posted earlier, under the same conditions I couldn't get a single 480p60 clip to record a full 30 minutes before encountering it. At 720p60 it happened four minutes into the second clip.

So my guess at this point is that the 60p frame rates will produce the temperature warning sooner than shooting at 24p or 30p. In my opinion 1080p24 is the frame rate which is the least taxing on the camera. I'll bet it works hardest, and therefore heats up more quickly, at 480p60 because of all the real-time down-conversion it has to do. Knocking it down to 640x480 from eighteen megapixels is probably a bigger job than going to 1920x1080 or 1280x720. But I'm just guessing.
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Old October 1st, 2009, 04:11 PM   #43
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yep I know someone who used 3 5dmkII on a film set and all of them are now dead due to overheating. A worry. Hence the cautious warning on the 7d. You should all move to England. It's cold here.
I use the 5d2 as a supplemental cam for the past few months and have never shot a clip longer than 4 mins - and while I do feel that the body warms up, I've never seen a temp warning. I can see if you were running this thing full out, that the body would continue to heat up and possibly cook.

If this real a serious threat - wouldn't we have seen more cooked 5d2 bodies by now?

I couldn't find any warning in the 5d manual (though I may have missed it). Maybe this is an ulterior motive behind the 12 minute recording limit?
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Old October 1st, 2009, 04:12 PM   #44
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How about outside with no air conditioning? I can't always shoot in comfortable conditions.
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Old October 1st, 2009, 04:25 PM   #45
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I just read the warning on the manual, it said holding a hot camera for a long time could slightly burn your hand, I wonder how hot it would get for them to put a warning in like this, and maybe this is the reason why they recommend using UDMA card to avoid banding and noise?
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